diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..239097c
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: yarn
+
+      - name: Enable Corepack
+        run: corepack enable
+
+      - name: Install dependencies
+        run: yarn install --immutable
+
+      - name: Test
+        run: yarn test:ci
+
+      - name: Lint
+        run: yarn lint
+
+      - name: Build
+        run: yarn build
diff --git a/test/heuristics.spec.tsx b/test/heuristics.spec.tsx
index 2dfc904..e716f1f 100644
--- a/test/heuristics.spec.tsx
+++ b/test/heuristics.spec.tsx
@@ -16,6 +16,14 @@ const getStats = (numbers: number[]) => ({
   max: max(numbers),
 });
 
+const mockSeededRandom = (seed: number) => {
+  let state = seed;
+  return jest.spyOn(Math, "random").mockImplementation(() => {
+    state = (state * 16807) % 2147483647;
+    return (state - 1) / 2147483646;
+  });
+};
+
 const roundsToString = (rounds: Round[]) =>
   rounds
     .map(
diff --git a/yarn.lock b/yarn.lock
index 39649f6..38b3c70 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8486,6 +8486,42 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jumbled-doubles-enhanced@workspace:.":
+  version: 0.0.0-use.local
+  resolution: "jumbled-doubles-enhanced@workspace:."
+  dependencies:
+    "@nextui-org/react": ^2.2.9
+    "@testing-library/jest-dom": ^5.16.5
+    "@testing-library/react": ^13.4.0
+    "@testing-library/user-event": ^14.4.3
+    "@types/jest": ^29.2.5
+    "@types/lodash": ^4.14.202
+    "@types/node": 18.11.18
+    "@types/react": 18.0.26
+    "@types/react-dom": 18.0.10
+    "@types/uuid": ^9.0.0
+    autoprefixer: ^10.4.15
+    circletype: ^2.3.0
+    clsx: ^2.1.0
+    eslint: 8.30.0
+    eslint-config-next: 13.1.1
+    framer-motion: ^10.16.4
+    jest: ^29.3.1
+    jest-environment-jsdom: ^29.3.1
+    lodash: ^4.17.21
+    next: ^13.4.8
+    next-pwa: ^5.6.0
+    postcss: ^8.4.29
+    react: 18.2.0
+    react-dom: 18.2.0
+    react-iconly: ^2.2.5
+    tailwind-variants: ^0.1.20
+    tailwindcss: ^3.4.0
+    typescript: 4.9.4
+    uuid: ^9.0.0
+  languageName: unknown
+  linkType: soft
+
 "kleur@npm:^3.0.3":
   version: 3.0.3
   resolution: "kleur@npm:3.0.3"
@@ -9419,42 +9455,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pickleball-shuffler@workspace:.":
-  version: 0.0.0-use.local
-  resolution: "pickleball-shuffler@workspace:."
-  dependencies:
-    "@nextui-org/react": ^2.2.9
-    "@testing-library/jest-dom": ^5.16.5
-    "@testing-library/react": ^13.4.0
-    "@testing-library/user-event": ^14.4.3
-    "@types/jest": ^29.2.5
-    "@types/lodash": ^4.14.202
-    "@types/node": 18.11.18
-    "@types/react": 18.0.26
-    "@types/react-dom": 18.0.10
-    "@types/uuid": ^9.0.0
-    autoprefixer: ^10.4.15
-    circletype: ^2.3.0
-    clsx: ^2.1.0
-    eslint: 8.30.0
-    eslint-config-next: 13.1.1
-    framer-motion: ^10.16.4
-    jest: ^29.3.1
-    jest-environment-jsdom: ^29.3.1
-    lodash: ^4.17.21
-    next: ^13.4.8
-    next-pwa: ^5.6.0
-    postcss: ^8.4.29
-    react: 18.2.0
-    react-dom: 18.2.0
-    react-iconly: ^2.2.5
-    tailwind-variants: ^0.1.20
-    tailwindcss: ^3.4.0
-    typescript: 4.9.4
-    uuid: ^9.0.0
-  languageName: unknown
-  linkType: soft
-
 "picocolors@npm:^1.0.0":
   version: 1.0.0
   resolution: "picocolors@npm:1.0.0"